The temperature measuring device shall be cable of accurately measuring the temperature of freshly
mixed concrete to 1°F through a range of____________________________. - 30 - 120°F
It is acceptable to measure the temperature of freshly mixed concrete in the forms provided? - The
sensor of the...
ACI Field Grade 1 Practice Test | 50 Questions with 100% Correct Answers | Verified | Latest Update 2024 The temperature measuring device shall be cable of accurately measuring the temperature of freshly mixed concrete to 1°F through a range of____________________________. - ✔✔30 - 120°F It is acceptable to measure the temperature of freshly mixed concrete in the forms provided? - ✔✔The sensor of the temperature measuring device has at least 3 in. of cover in all directions. Composite samples are required even if the only purpose for obtaining the sample is to determine temperature. - ✔✔False The temperature measuring device is left in the freshly mixed concrete for at least _______________ but not more than 5 minutes. - ✔✔2 minutes Test Method C1064/C1064M specifies a maximum temperature of freshly mixed concrete. - ✔✔False The elapsed time between obtaining the first and final portions of a composite sample shall not exceed ____________________. - ✔✔15 minutes Individual samples shall be combined and remixed with a shovel the minimum amount necessary to ensure uniformity. - ✔✔True The following test must be started within 5 minutes after obtaining the final portion of the composite sample: - ✔✔Slump, Temperature, Air Content The concrete sample must be protected from? - ✔✔Contamination & Evaporation When strength specimens are to be made, the minimum sample size is __________________. - ✔✔1.0 ft3 Portions of the composite should be taken from the _______________of the batch discharge. - ✔✔Middle A composite sample taken from a paving mixer consists of _______________ individual samples taken from different portions of the pile. - ✔✔Five The process of removing aggregate larger than a designated size from the fresh concrete by sieving it on a sieve of the designated size is know as? - ✔✔Wet Sieving The slump test is considered applicable to plastic concrete having a coarse aggregate up to ____________________. - ✔✔1 1/2 in. The height of the slump mold is_________________. - ✔✔12 inches The interior surface of the slump mold shall be relatively smooth and free from projections. - ✔✔True The tamping rod used for the slump test shall have a minimum length of ____________ and a maximum length of _______________. - ✔✔16 in. & 24 in. The slump mold is filled in ___________ layers of _______________. - ✔✔3, equal volume If the concrete subsides below the top of the slump mold while rodding the top layer, the test is invalid. - ✔✔False Slump is determined by measuring the vertical distance between? - ✔✔The top of the mold and the original displaced center of the top surface of the specimen. Slump is reported to the nearest? - ✔✔1/4 in.
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